FLORIDA GEOGRAPHIC DATA LIBRARY DOCUMENTATION
VERSION 2.0, RELEASED JULY 1999.

DRG24K INDEX 

Geodataset Name:      DRGCAT
Geodataset Type:      Shapefile
Geodataset Feature:   Polygon

GENERAL DESCRIPTION

This dataset is an index for 1:24000 DRG images. The images are scanned USGS 1:24000 (7.5 minute) quadrangles. This index shapefile is a collection of rectangles that represent the extent of each DRG image. Each rectangle (polygon) holds information about the associated image, including the quad name and image extent coordinates.

Each county has a seperate shapefile. The name of the shapefile contains a number that identifies the county. Counties are numbered alphabetically. {ex. 01 = Alachua County}

These shapefiles were created at the GeoPlan Center to work with a specific ArcView application created and distributed by the GeoPlan Center. 

DATA SOURCE(S):                      UNIVERSITY OF FLORIDA 
                                     GEOPLAN CENTER

SCALE OF ORIGINAL SOURCE MAPS:       Not applicable

DATE OF AUTOMATATION OR SOURCE:      JUNE 1999
 
GEODATASET EXTENT:                   State of Florida

FEATURE ATTRIBUTE TABLES
Datafile Name: DRGCAT.DBF 

ITEM NAME    WIDTH    TYPE    N.DEC
 IMAGE        75       C       - 
 XMIN         15       F       4
 YMIN         15       F       4
 XMAX         15       F       4
 YMAX         15       F       4
 IMAGE_BYTES   8       I       -
 QUAD_NUM      5       C       -
 QUAD_NAME    40       C       -

FEATURE ATTRIBUTE TABLES CODES AND VALUES 

Item         Item description

IMAGE        Each rectangle in this shapefile represents 
             the extent of an image.  This field holds the 
             image name for the image associated with the 
             rectangle (polygon).

XMIN         The XMIN coordinate for the image's extent.

YMIN         The YMIN coordinate for the image's extent.

XMAX         The XMAX coordinate for the image's extent.

YMAX         The YMAX coordinate for the image's extent.

IMAGE_BYTES  Size of associated image in bytes.

QUAD_NUM     Quad number.

QUAD_NAME    Images are scanned quadrangles.  This field 
             holds the name of the associated quadrangle.

USER NOTES:

FGDL QUALITY ASSURANCE STATUS:

Final QA performed upon creation.

REFERENCES:

DATA LINEAGE SUMMARY:

MAP PROJECTION PARAMETERS: 

Projection                         ALBERS
Units                              METERS
Datum                              NAD27
Spheroid                           CLARKE1866
1st standard parallel              24    0  0.000
2nd standard parallel              31   30  0.000
central meridian                  -84    0  0.000
latitude of projection's origin    24    0  0.000
false easting (meters)             400000.00000
false northing (meters)            0.00000

DATA SOURCE CONTACT(S): 

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                FGDL, GeoPlan Center, University of Florida
                        431 Architecture
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.geoplan.ufl.edu/fgdl.html

FGDL CONTACT: 

Name:                   FLORIDA GEOGRAPHIC DATA LIBRARY
Abbr. Name:             FGDL
Address:                FGDL, GeoPlan Center, University of Florida
                        431 Architecture
                        PO Box 115706
                        Gainesville, FL  32611-5706
Web site:               http://www.geoplan.ufl.edu/fgdl.html

HELP FROM FGDL*:

* The FGDL FAQ and FGDL MAILING LISTS are the quickest methods of finding solutions to your problems. Please use the email addresses after first consulting the FGDL FAQ and MAILING LISTS. The voice mail number is for use if you do not have access to email or the internet.

Please note: We are a small university laboratory and have a limited staff. We will do our best to answer your questions in a timely manner. Thank you for your support.